Slightly warm soft tortillas so they’re easier to handle and are less likely to split as you roll them. Place tortilla on work surface and set lettuce leaf off-center on tortilla. Place 1/4 of the cooked rice just below center of tortilla. Top with 1/4 of each of the following: black beans, corn, kimchi, cheese, and cilantro. Be sure ingredients are slightly off-center, with at least a 1 inch border.